I used to work in hotels, so I’m pretty familiar with the whole block thing. 🙂 $99.00 single/double occupancy means that it’s for 1 or 2 guests in the room. If you increased to 3 or 4 guests per room, the rate would go up. At our hotel, it was usually $99/$99/$109/$119 for single/double/triple/quad.

10 is the normal minimum number of rooms you can have in a block. I would definitely ask her if you can increase your block if the 10 are booked. Depending on the situation and their current occupancy levels, they may or may not be able to give you more at the block rate if you need more.